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Anti-chlorine and antibacterial molybdenum disulfide/polyester composite nanofiltration membrane with photo-thermal conversion effect and preparation method of composite nanofiltration membrane

A composite nanofiltration membrane and photothermal conversion technology, which is applied in the field of anti-chlorine, antibacterial molybdenum disulfide/polyester composite nanofiltration membrane with photothermal conversion effect and its preparation field, and can solve the problem of improving the performance of thin-layer composite nanofiltration membrane It is not obvious, the separation performance of the thin-layer composite nanofiltration membrane decreases, and graphene oxide aggregates, etc., to achieve good tolerance, good chlorine resistance, and good compatibility.

Inactive Publication Date: 2019-08-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the addition amount is relatively low, the performance improvement of the thin-layer composite nanofiltration membrane will not be obvious; The separation performance of
Second, the non-oxidized regions of graphene oxide are less compatible with polyamides and are prone to generate defects in the cortex
In addition, the graphene oxide doped in the polyamide skin can only play a certain physical barrier to the attack of active chlorine, so the chlorine resistance effect is not good.

Method used

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  • Anti-chlorine and antibacterial molybdenum disulfide/polyester composite nanofiltration membrane with photo-thermal conversion effect and preparation method of composite nanofiltration membrane
  • Anti-chlorine and antibacterial molybdenum disulfide/polyester composite nanofiltration membrane with photo-thermal conversion effect and preparation method of composite nanofiltration membrane
  • Anti-chlorine and antibacterial molybdenum disulfide/polyester composite nanofiltration membrane with photo-thermal conversion effect and preparation method of composite nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Weigh 200mg of tannic acid and dissolve it in 100ml of ultrapure water, then add 200mg of molybdenum disulfide and mix well.

[0053] (2) Ultrasound the mixture for 2 hours in an ice-water bath environment, the ultrasonic power is 300W, and the ice is changed every 30 minutes to ensure low temperature. The solution obtained after ultrasonication was centrifuged to separate the supernatant at a speed of 8000 rpm for 10 minutes, and the supernatant was absorbed to obtain a single-layer molybdenum disulfide aqueous solution with an initial concentration of 2g / L, which was stored in a refrigerated environment at 4°C.

[0054] (3) The monolayer molybdenum disulfide aqueous solution prepared above was diluted with deionized water to obtain monolayer molybdenum disulfide solutions with different concentrations, which were used as the aqueous phase solution for the polymerization reaction.

[0055] (4) Suction filter 2mL of the aqueous phase solution with a concentration of...

Embodiment 2～5

[0057] Adjust the concentration of trimesoyl chloride in the oil phase solution, keep the concentration of the single-layer molybdenum disulfide nanosheets stripped by tannic acid in the aqueous phase solution at 0.5g / L, and filter 2mL of the aqueous phase solution to an area of ​​7.07cm 2 On the base film, all the other experimental conditions are with embodiment 1.

[0058] The molybdenum disulfide / polyester composite nanofiltration membranes prepared in Examples 1-5 were tested for water flux and sodium sulfate desalination rate, and the experimental results are shown in Table 1.

[0059] The performance of the composite nanofiltration membrane that table 1 embodiment 1~5 prepares

[0060]

[0061] As can be seen from the data in Table 1, the concentration of trimesoyl chloride has a significant impact on the performance of the prepared molybdenum disulfide / polyester composite nanofiltration membrane. Under the same molybdenum disulfide concentration, as the concentrati...

Embodiment 6～10

[0085] Adjust the concentration of the single-layer molybdenum disulfide nanosheets stripped by tannic acid, keep the volume of the aqueous phase solution for suction filtration at 2mL, and the area of ​​the bottom film is still 7.07cm 2 , keep the trimesoyl chloride concentration in the oil phase solution as 0.1g / L constant, and all the other experimental conditions are the same as in Example 1.

[0086] The molybdenum disulfide / polyester composite nanofiltration membranes prepared in Examples 6-10 were tested for water flux and sodium sulfate desalination rate, and the experimental results are shown in Table 6.

[0087] Nanofiltration membrane performance prepared by table 6 embodiment 6~10

[0088]

[0089]From the data in Table 6, it can be seen that with the increase of the concentration of monolayer molybdenum disulfide nanosheets stripped by tannic acid, the flux of molybdenum disulfide / polyester composite nanofiltration membrane showed a trend of first increasing an...

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Abstract

The invention discloses an anti-chlorine and antibacterial molybdenum disulfide / polyester composite nanofiltration membrane with a photo-thermal conversion effect. The composite nanofiltration membrane comprises a porous supporting membrane and a functional skin layer covering the surface of the porous supporting membrane; the functional skin layer is obtained by an interfacial polymerization reaction of a water-phase monomer and an oil-phase monomer on the porous supporting membrane; and the water-phase monomer is a single-layer molybdenum disulfide nanosheet which is obtained by ultrasonic stripping by using tannic acid. The invention also discloses a preparation method of the molybdenum disulfide / polyester composite nanofiltration membrane. The molybdenum disulfide / polyester composite nanofiltration membrane has the characteristics of high flux and high desalination rate, has good tolerance to active chlorine in water and also has certain antibacterial performance. In addition, pollutants on the surface of the molybdenum disulfide / polyester composite nanofiltration membrane can be removed more easily under irradiation of near infrared light.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a chlorine-resistant and antibacterial molybdenum disulfide / polyester composite nanofiltration membrane with photothermal conversion effect and a preparation method thereof. Background technique [0002] Nanofiltration membranes have important applications in water treatment, environmental engineering, biopharmaceutical and food industries. Among them, the thin-layer composite nanofiltration membrane has attracted much attention because of its high flux and high rejection characteristics. [0003] The thin-layer composite nanofiltration membrane is composed of a selective skin layer and a porous bottom membrane. The selective skin layer is usually a dense polyamide film, which is obtained by the polymerization reaction of polyamine molecules and polyacyl chloride molecules. Under the joint action of the sieving effect caused by the pore size and the Donnan effect caused by the...

Claims

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Application Information

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IPC IPC(8): B01D71/48B01D69/12B01D69/02B01D67/00B01D61/02
CPCB01D61/027B01D67/0006B01D67/009B01D69/02B01D69/12B01D71/48B01D2321/34B01D2325/22B01D2325/30B01D2325/48Y02A20/131
Inventor 徐志康马梦琪杨静
Owner ZHEJIANG UNIV
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